AEM X-Series Plus OBD2 Wideband AFR Gauge Kit - aem30-0534

The AEM X-Series Plus OBDII Wideband AFR Gauge Kit (Part Number: 30-0534) is an advanced air/fuel ratio monitoring solution designed for performance enthusiasts, tuners, and professional calibrators seeking accurate, real-time AFR data. Featuring AEM's patented X-Digital technology, this wideband UEGO controller delivers exceptionally fast response times and precise air/fuel ratio readings to support safer, more accurate, and higher-performing engine tuning.

Designed for vehicles equipped with an OBDII diagnostic port, the gauge communicates directly with the factory ECU through the vehicle's CAN-bus network. This allows tuners using piggyback tuning modules or open-source tuning software to monitor wideband AFR readings through the factory CAN-bus data stream.

The AEM X-Series OBDII Wideband Gauge is validated for compatibility with DiabloSport inTune 3, Trinity 2, EFILive, HP Tuners, and DashDaq software.

The kit includes an OBDII pass-through connector and a Bosch 4.9LSU wideband UEGO oxygen sensor. The sensor features factory resistor calibration, eliminating the need for initial free-air calibration. Free-air calibration is also supported and can be performed as the sensor ages if desired.

Additional wiring can be installed by the user to provide 0-5V analog or RS232 serial outputs for external data logging and feedback control. The OBDII pass-through functionality replaces the traditional AEMnet output available in the 30-0300 X-Series Wideband AFR Gauge Controller.

OBDII CAN-Bus Output and Programmability

The OBDII output simulates an auxiliary ECU signal when connected to the vehicle's OBDII port, requiring a unique CAN address that does not conflict with other ECUs on the vehicle network.

The factory default OBDII CAN address is designed to work with most popular vehicles and typically requires no adjustment. For applications requiring a different address, the gauge face buttons allow users to program the following parameters:

• ECU number

• Parameter Identification (PID)

• Message Identifier

• CAN-bus Bit Rate

This programmable functionality provides greater flexibility when integrating the wideband gauge with different vehicle platforms and tuning systems.

Patented X-Digital Technology for Faster AFR Response

AEM X-Series Wideband AFR Controllers feature patented X-Digital technology (Patent No. 9,575,030), delivering exceptionally fast response times and maintaining signal accuracy during rapid engine operating changes.

In independent testing against 17 competing wideband UEGO air/fuel ratio controllers, AEM X-Series Widebands demonstrated the fastest response times.

The high-speed X-Digital technology minimizes signal delay and preserves full transient response, allowing the controller to detect even the smallest air/fuel ratio fluctuations and deliver accurate readings without losing signal fidelity.

Why Wideband Response Time Matters

Fast wideband response is essential for accurate engine tuning and effective feedback control. Reduced response delay allows tuners to identify air/fuel ratio changes more quickly, helping optimize fuel delivery, improve tuning accuracy, and support safer, more powerful engine performance.

By minimizing dead time and providing highly responsive AFR feedback, AEM X-Series technology helps deliver more precise engine calibration.

Features

• Fastest-responding wideband air/fuel ratio controller in independent testing against 17 competing wideband AFR controllers.

• Patented X-Digital wideband technology (Patent No. 9,575,030).

• Includes Bosch 4.9LSU wideband UEGO oxygen sensor.

• Factory resistor calibration eliminates the need for initial free-air calibration.

• Supports optional free-air calibration as the sensor ages.

• Compatible with vehicle and system voltages up to 16V.

• 0-5V analog output for external data logging and feedback control.

• RS232 serial output for data logging and external monitoring.

• AEMnet CAN-bus support for data logging and daisy-chaining multiple controllers, supporting up to 16 cylinders.

• Displays AFR readings with precision to hundredths of a percent.

• 52mm gauge diameter with a slim 0.825-inch gauge depth.

• Gauge cup depth of only 0.200 inches.

• Automatic dimming functionality.

• User-configurable display through buttons on the gauge face.

• Adjustable display formats for AFR, Lambda, and O2 percentage.

• Selectable 3-digit or 4-digit display configuration.

• Includes black bezel and black dual-faced faceplate.

• Silver bezel and white gauge option available separately (Part Number: 30-0300-ACC).

• Locking electrical connectors for secure connections.

• Includes mounting hardware.

Product Specifications

Fitment

• Fitment Type: Universal.

• Vehicle Compatibility: Designed for vehicles equipped with an OBDII diagnostic port and compatible CAN-bus network.

• Installation: Requires connection to the vehicle's OBDII port.

• Tuning Software Compatibility: DiabloSport inTune 3, DiabloSport Trinity 2, EFILive, HP Tuners, and DashDaq.

• CAN-Bus Compatibility: Uses a programmable OBDII CAN address to support integration with compatible vehicle networks.

• Additional Outputs: Optional 0-5V analog and RS232 serial wiring for external data logging and feedback control.

Note: This is a universal performance gauge kit, not a vehicle-specific direct-fit application. CAN-bus compatibility and installation requirements should be verified for the intended vehicle.